**P1 - Precision hadron physics**

Principal investigators:

Denig, Achim, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Wittig, Hartmut, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Associated principal investigator:

Czyz, Henryk, Prof. Dr., Institute of Physics, University of Silesia, Katowice, Poland

**P2 - The weak charge of the proton**

Principal investigators:

Aulenbacher, Kurt, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Berger, Niklaus, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Maas, Frank E., Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Kumar, Krishna, Prof. Dr., SUNY Stony Brook, USA

Spiesberger, Hubert, Institute of Physics, JGU Mainz

Associated principal investigators:

### S1 - Baryon form factors

Principal investigators:

Maas, Frank E., Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Merkel, Harald, Dr., Institute of Nuclear Physics, JGU Mainz

Meyer, Harvey B., Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Vanderhaeghen, Marc, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Associated principal investigators:

### S2 - Polarizabilities

Principal investigators:

Hornige, David, Prof. Dr., Mount Allison University, Canada

Ostrick, Michael, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Pascalutsa, Vladimir, Dr., Institute of Nuclear Physics, JGU Mainz

Sfienti, Concettina, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Associated principal investigators:

### S3 - Light hadron spectroscopy

Principal investigators:

Fritsch, Miriam, Prof. Dr., Ruhr-Universität Bochum

Meyer, Harvey B., Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Ostrick, Michael, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Associated principal investigators:

### M1 - Gamma gamma physics and meson structure

Principal investigators:

Denig, Achim, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Vanderhaeghen, Marc, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Associated principal investigators:

### M2 - Meson dynamics

Principal investigators:

Berger, Niklaus, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Fritsch, Miriam, Prof. Dr., Ruhr-Universität Bochum

Gradl, Wolfgang, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Scherer, Stefan, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Associated principal investigators:

### N - Interactions in nuclear systems

Principal investigators:

Distler, Michael, Dr., Institute of Nuclear Physics, JGU Mainz

Pochodzalla, Josef, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Sfienti, Concettina, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Associated principal investigators:

### Z - Central administration

Denig, Achim, Prof. Dr., Institute of Nuclear Physics, JGU Mainz

Vanderhaeghen, Marc, Prof. Dr., Institute of Nuclear Physics, JGU Mainz